A remote region amid gigantic peaks in the Himalayas is home to just 100,000 people but makes four nuclear power plants worth of energy. But in past years resentment against the hydroelectric dams has grown, mirroring concerns across the environmentally sensitive Himalayas about building dams with inadequate assessments. This has raised questions about what one expert describes as a “necessary risk” for India to bet on hydropower to ensure 24/7 power from clean energy, instead of battery storage. Dams, unlike batteries, don't rely on expensive imports and some can also store energy when the sun isn’t shining, or the wind isn’t blowing.